--- Aaron <[EMAIL PROTECTED]> wrote: > I'm rather experienced with desktop Macs but have little experience > with powerbooks. > > My friend's G3/266/14.1" TFT (I hope that sufficiently identifies the > model!) PB recently stopped working. Whether with the battery in, the > adapter connected, or both, it doesn't go on. The only sign of life > is the green light that goes on for a second when I hold down > Fn-Control-Shift and press the power button. > > I tested the voltage between the outer metal cylinder against the tip > of the center post. (Since I don't know whether the power adapter is > supposed to supply its 24 volts as DC or AC, I tried both!) Nothing! > > Does this mean the adapter is dead, or should the voltage drop be > between two different parts of the center post, like with stereo > plugs? > > If it is dead, what are the alternatives to Apple's $75 replacement? > Are there non-Apple replacements? I could probably put something > together using the plug from the dead one. Is the output AC or DC? > If DC, what is the polarity? >
The power on the plug is this: tip = not connected ring = negative sleeve = positive shell = negative (don't confuse sleeve and shell!) The plug is very similar to a standard 1/8 inch stereo plug. But the outside shell is connected to the center conductor (ring) and NOT to the longer shank which I called the "sleeve". Therefore, you should not measure any voltage where you say you did your measuring. It is not easy to probe with voltmeter test leads, in fact, impossible. You need to connect some carefully designed little wires to your test probes to stick in the plug. Greg __________________________________________________ Do you Yahoo!? Faith Hill - Exclusive Performances, Videos & More http://faith.yahoo.com -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:powerbooks@;mail.maclaunch.com> To unsubscribe, email: <mailto:powerbooks-off@;mail.maclaunch.com> For digest mode, email: <mailto:powerbooks-digest@;mail.maclaunch.com> Subscription questions: <mailto:listmom@;lowendmac.com> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
